Dust-free blackboard eraser

The technology of a blackboard eraser and bottom board, which is applied in the field of teaching equipment, can solve the problems of high cost, impossibility of popularization, inconvenient use, etc., and achieve the effect of low cost, simple structure and easy popularization

Inactive Publication Date: 2008-02-20
税宁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main solutions can be roughly divided into two types: one is to set gray blocking strips or boards around the brushing block; in this solution, most of the gray blocking strips are fixed or passively rotated, so the chalk dust raised by the blackboard cannot be removed. Completely block access to the inner cavity of the blackboard eraser; the other is to set up a vacuum device to absorb the chalk dust wiped off. This solution is generally driven by a motor, and most of them are powered by an AC power supply with wires, which is inconvenient to use and High cost, not popular

Method used

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  • Dust-free blackboard eraser
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Shell 1 of the present invention can adopt plastics to make, and shell 1 is rectangular box body, and front four periphery is provided with the square frame shape cover plate 1-1 that can disassemble freely, and the lower end of shell 1 is ash chamber 7, and the bottom of shell 1 The end face is set as a push-pull open type movable plate, which can easily pour out the chalk dust stored when wiping the blackboard. The hair wiping block 2 is made up of a wiping block body and a hair wiping body, and the wiping block body is made of a hard material. Installed in the middle of the bottom plate of the inner cavity of the shell 1, the hair wiping body is made of woolen cloth with strong adsorption and good wiping effect, and is glued to the front surface of the wiping block body with glue, the hair wiping block 2 and the wiping block 2 Correspondingly, there is a rectangular battery slot and a battery cover on the bottom plate of the shell 1. The battery slot is connected with...

Embodiment 2

[0014] It is basically the same as Example 1, the difference is that the brushing block and the brushing body of the brushing block 2 are pasted together by Velcro, which can be easily removed to clean the dust in the brushing body, and there are four dust-stopping strips 4 , respectively fixed on the left and right sides and the upper and lower inner cavity floor of the housing 1 by the bearing seat 2, the gray bar 4 is composed of the roller 4-1 and the brown hair arranged on the roller 4-1 5-3 composition, the lower end of the left gray bar 4 and the upper and lower ends of the right gray bar 4 are equipped with transmission gears 5 respectively, and the upper gray bar 4 corresponds to the right gray bar 4 One end and the two ends of the gray bar 4 below are equipped with disc gear 6 respectively, and other are with embodiment 1.

Embodiment 3

[0016] It is basically the same as embodiment 1, the difference is that there are two gray-blocking strips 4, and the two gray-blocking strips 4 are respectively fixed on the inner cavity bottom plate of the left and right side shells 1 of the brushing block 2 by bearing seats, The upper and lower ends of the two gray bars 4 are respectively provided with transmission gears 5, and the lower ends of the two gray bars are connected by a transmission shaft. Disc gear 6 is linked with the transmission gear 5 of the left and right side gray bars 4 lower ends, and others are with embodiment 1.

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Abstract

The present invention discloses a dust free blackboard wrapper, comprising a shell, a wrapping plate, a motor and an ash damper. The wrapping plate is fixedly arranged in the middle of the shell cavity. The lower end of the shell is provided with an ash collecting room. The present invention is characterized in that the front four sides of the shell are provided with a square frame type cover board; a battery groove and a cover board are arranged inside the wrapping plate and on the corresponding soleplate of the shell; the ash damper is provided with two to four, and each ash damper consists of a rolling post and manes or concave flabellum which are arranged on the rolling post; the ash damper is fixedly arranged on the soleplate of the shell cavity which is positioned at the side of the wrapping plate, the upper end of the ash damper tightly clings to the square frame type cover board while one side of the ash damper is positioned inside the square frame type cover board; the ash dampers are connected with each other through a gear; the motor is fixedly arranged on the upper end head of one side of the shell, and is connected with the ash damper and the motor which are arranged at the corresponding side. The present invention has the advantages of simple structure, easy operation, being capable of fully absorbing the chalk ash into the shell cavity by the ash damper, no chalk ash flying, low production cost, and easy popularization and use.

Description

Technical field: [0001] The invention relates to teaching tools, in particular to a dust-free blackboard eraser. Background technique: [0002] In order to solve the problem of air pollution in classrooms caused by chalk dust produced when wiping blackboards, various dust-free blackboard erasers have been invented. The main solutions can be roughly divided into two types: one is to set gray blocking strips or boards around the brushing block; in this solution, most of the gray blocking strips are fixed or passively rotated, so the chalk dust raised by the blackboard cannot be removed. Completely block access to the inner cavity of the blackboard eraser; the other is to set up a vacuum device to absorb the chalk dust wiped off. This solution is generally driven by a motor, and most of them are powered by an AC power supply with wires, which is inconvenient to use and The cost is high and cannot be popularized. Invention content: [0003] The purpose of the present inventi...

Claims

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Application Information

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IPC IPC(8): B43L21/02
Inventor 税宁税钓桂
Owner 税宁
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